package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;

import org.springframework.beans.BeanUtils;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
     @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if (RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式不正确");
        }
        //2.生成验证码
        String code = RandomUtil.randomNumbers(6);
        //3.验证码存到redis里面 加前缀为了区分
        stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY +phone,code,RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //4.发送验证码
        log.info("发送的验证码{}",code);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式不正确");
        }
       //2.获取前端的验证码
        String catchCode = loginForm.getCode();
        //3.从redis里面获取验证码
        String code = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY + phone);
        //2.校验验证码
        if (code==null||!code.equals(catchCode)){
            //3.不一致
            return Result.fail("验证码不正确");
        }
        //4.根据手机号查询用户 select *from user_tab where id=
        User user = query().eq("phone", phone).one();
        if (user==null){
            //5.不存在创建新用户
            user=creatUser(phone);
        }
        //6. 用户存在保存到redis里面
        //6.1 随机生成token
        String token = UUID.randomUUID().toString(true);
        //6.2  将用户信息转化为Hash拱后面redis存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((filName,fieldValue)->fieldValue.toString())
                );
        //6.3  用户存在保存到redis里面 key
        String tokenKey = RedisConstants.LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        //6.4  设置有效时间
        stringRedisTemplate.expire(tokenKey,RedisConstants.LOGIN_USER_TTL,TimeUnit.MINUTES);
        //7.返回到客户端
        System.out.println(tokenKey);
        return Result.ok(token);
    }

    private User creatUser(String phone) {
        User user=new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX +RandomUtil.randomString(10));
        //5.保存到数据库
        save(user);
         return user;
    }
}
